If you have a dog, just THINK about taking them for a walk. Think about it really clearly, loudly if you will... imagine your thoughts about going for a walk expanding and enveloping your dog. Imagine the process, getting the leash, etc... get excited in your mind without showing any physical sign of it.
Then see if your dog starts getting excited and comes up to you hoping to go.
I've seen this before, I really think dogs can read thoughts. When you are sad too, they know it
